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Solid-solute phase equilibria in aqueous solution. IV. Calculation of Phase Diagrams

Königsberger, E.ORCID: 0000-0002-4606-0741 and Gamsjäger, H. (1990) Solid-solute phase equilibria in aqueous solution. IV. Calculation of Phase Diagrams. Zeitschrift für anorganische und allgemeine Chemie, 584 (1). pp. 185-193.

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The thermodynamic principles of conventional (T-x, P-T) phase diagrams and solubility (log ΣK-x) diagrams depicting solid-solute phase equilibria in aqueous solution are derived from a unifying point of view. It is shown that thermodynamic quantities necessary for the construction of conventional phase diagrams can be obtained from solubility measurements. The unary system calcite-aragonite and the binary system aragonite-strontianite, where solubility data are available over the whole compositional range, have been selected as examples. In the latter case, the constraint of constant composition of the solid phase leading to a metastable equilibrium with the respective solute species is an essential point in the thermodynamic derivation and was observed experimentally as well.

Item Type: Journal Article
Publisher: Verlag GmbH & Co. KGaA, Weinheim
Copyright: © 1990 Verlag GmbH & Co. KGaA, Weinheim
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